EP 0033898 B2 19860312 - PROCESS FOR PREPARING AQUEOUS POLYURETHANE DISPERSIONS
Title (en)
PROCESS FOR PREPARING AQUEOUS POLYURETHANE DISPERSIONS
Publication
Application
Priority
DE 3005010 A 19800211
Abstract (en)
[origin: US4314922A] A process for preparing aqueous polyurethane dispersions has been discovered which comprises (a) forming a polyurethane solution by reacting an organic polyisocyanate in the presence of a solvent with (i) an acrylic ester diol having a molecular weight of between 146 and 3,000; (ii) an organic polyhydroxyl compound other than (i) having a molecular weight between 400 and 5,000 selected from the group consisting of polyester polyols, polyether polyols, polycarbonates, polylactones, and mixtures thereof; and (iii) a chain extender having a molecular weight between 62 and 400 selected from the group consisting of diols, triols, diamines, aminoalcohols, and mixtures thereof; (b) forming an anionic polyurethane addition product by reacting said polyurethane solution with a mercaptocarboxylic acid salt in the presence of a solvent; (c) adding water; and (d) removing the solvent. The dispersions can be used in a variety of applications. For instance, they can be used to prepare films, coating, and binders.
IPC 1-7
IPC 8 full level
C08G 18/00 (2006.01); C08G 18/08 (2006.01); C08G 18/64 (2006.01); C08G 18/67 (2006.01); C08G 18/83 (2006.01); C08J 3/07 (2006.01)
CPC (source: EP US)
C08G 18/6705 (2013.01 - EP US); C08G 18/675 (2013.01 - EP US); C08G 18/835 (2013.01 - EP US); C08J 3/07 (2013.01 - EP US); C08J 2375/04 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE FR GB NL
DOCDB simple family (publication)
EP 0033898 A1 19810819; EP 0033898 B1 19831102; EP 0033898 B2 19860312; AU 6713781 A 19810820; BR 8100764 A 19810825; DE 3005010 A1 19810820; DE 3161297 D1 19831208; JP S56127618 A 19811006; US 4314922 A 19820209
DOCDB simple family (application)
EP 81100585 A 19810128; AU 6713781 A 19810210; BR 8100764 A 19810209; DE 3005010 A 19800211; DE 3161297 T 19810128; JP 1705181 A 19810209; US 23172081 A 19810205